Mobile air pollution reduction system and method

ABSTRACT

A mobile air pollution reduction method and system which may be incorporated in a truck body to be disengaged from a main chassis and left at an operating station. In place, the unit is connected through inlet and exhaust conduits to a chimney, stack or flue. The inlet conduit includes an interrupt mechanism to deflect waste gases into the unit. Gases injected to the unit are forced through a predetermined path where they are subjected to a high pressure fluid stream which capture solid particles contained in the gases within the intercepting fluid. The cleansed gases and contaminated fluid are directed to a sump where the fluid is cleaned and recirculated through the system. The gases are passes through a final filter and exhausted to the atmosphere. Before being recirculated the fluid may be passed into a cooling system. Where incoming waste gases are only partially burned, a combustion chamber may be added to the system to ignite remaining unburned particles in the waste gases.

United States Patent 191 Brooks MOBILE AIR POLLUTION REDUCTION SYSTEM AND METHOD [76] Inventor: Ralph J. Brooks, I86 Clearview Avenue, Langhorne, Pa.

[22] Filed: June 16, 1971 [21] Appl.No.: 153,581

[52] US. Cl. ..55/85, 23/2 R, 23/277 C, 55/89, 55/90, 55/228, 55/229, 55/241,

261/118, 26l/DIG. 9

[51] Int. Cl. ..-.B01d 47/06 [58] Field of Search ..55/85, 89, 90, 228, 229, 241, 55/257, 356, 358; 23/2 R, 277 C; 110/119;

261/111, 118, DIG. 9

v 11] 3,719,028 51 March 6, 1973 Primary Examiner-Dennis E. Talbert, Jr.

Attorney-Paul Maleson [5 7] ABSTRACT A mobile air pollution reduction method and system which may be incorporated in a truck body to be disengaged from a main chassis and left at an operating station. In place, the unit is connected through inlet and exhaust conduits to a chimney, stack or flue. The inlet conduit includes an interrupt mechanism to deflect waste gases into the unit. Gases injected to the unit are forced through a predetermined path where they are subjected to a high pressure fluid stream which capture solid particles contained in the gases within the intercepting fluid. The cleansed gases and contaminated fluid are directed to a sump where the fluid is cleaned and recirculated through the system. The gases are passes through a final filter and exhausted to the atmosphere. Before being recirculated the fluid may be passed into a cooling system. Where incoming waste gases are only partially burned, a combustion chamber may be added to the system to ignite remaining unburned particles in the waste gases.

28 Claims, 5 Drawing Figures PATENIEDMAR 64973 SHEET 10F 3 FIG.2

PATERTED 9 5 SHEET 3 OF 3 won (3 MOBILE AIR POLLUTION REDUCTION SYSTEM AND METHOD BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to the field of air pollution reduction systems. In particular this invention pertains to mobile pollution reduction systems which may be incorporated into a truck body and driven to the site of industrial plants to be put in operation. More in particular this invention relates to an automatic on-site pollution reduction system to decontaminate industrial waste gases through a series of scrubbing and filtering steps before expulsion to the atmosphere.

2. Prior Art Air pollution reduction systems incorporating scrubbing, combusting and filtering techniques are known. However, prior art has not produced a compact system which may be incorporated into a truck body and driven to a remote site for installation. Further, known prior art has not devised a compact, automatic pollution reduction system which needs only a minimum of maintenance service. In addition, there is no'known prior art that interrupts the waste gas flow in an exhaust stack; directs the gases into the system and then returns the cleansed gases to the stack for expulsion to the atmosphere. Further, prior art does not provide a series of declined and vertically displaced fluid tables to form a compact washing volume for the contaminated gases internal to the unit. Additionally, prior art in this field has not provided systems which can be easily maintained through modular construction in order to allow removal of defective apparatus within a minimum amount of time delay.

SUMMARY OF THE INVENTION An air cleaning method and system adapted to remove pollutants from waste gases being transported through an exhaust stack positioned external to the system. An enclosed housing is located adjacent to the exhaust stack. A pair of inlet and exhaust conduits are inserted into the enclosed housing and exhaust stack respectively. The inlet conduit includes means for interrupting the waste gas flow through the exhaust stack and deflecting the flow into the enclosed housing. A plurality of vertically displaced tables are secured within the housing and provide a continuous flow path for waste gases passing through the system. Waste gas cleaning mechanisms inject fluid through the flow of waste gases and capture solid particles therefrom. Collection and transport mechanisms transfer the cleansed waste gas to the exhaust stack and recirculate the fluid to the waste gas cleaning units.

It is an object of this invention to provide a system and method for reducing pollutants contained in waste gases emitted from exhaust stacks, chimneys, or flues.

It is a further object of this invention to provide a mobile air pollution system that can be incorporated into a truck body and driven to a remote site for installation.

It is another object of this invention to produce a system which may be tapped directly into a working exhaust stack to inject waste gases into the cleaning unit and then redirect the cleansed gases through the exhaust stack to the atmosphere.

It is a still further object of this invention to produce a highly automated, compact, completely enclosed air pollution reduction system which necessitates a minimum of maintenance servicing.

BRIEF DESCRIPTION OF THE DRAWINGS area of the system taken along the section line 5-5 of FIG. 4.

DESCRIPTION OF THE PREFERRED EMBODIMENT Description of the Apparatus Referring to FIGS. 1 and 2 there is shown a mobile air pollution reduction system 10 for removing pollutants from waste gases produced in industrial burning processes. In general, system or enclosed housing 10 is transported to a remote site having need for cleansing of waste gas products and left in a semipermanent location for processing of waste gases with a minimum requirement for maintenance. Transportation of system 10 may be accomplished by incorporating it as a truck body on chassis 14. In this manner, housing 10 is transferred as a one piece unit to industrial plant 12 requiring pollution reduction in its exhaust gases. System 10 is located external to building 12 and relatively near exhaust stack 16 which is emitting waste gases to the atmosphere. Chassis 14 including attached housing 10 is positioned in precise alignment with stack 16 to provide optimum placement positioning of through conduits, to be described in detail in the following paragraphs. Units 10 and 14 are separated by raising system 10 from chassis 14 through the use of hydraulic jacks 18 placed at the corners of housing 10 to provide a relatively stable platform. Other methods of housing 10 placement may include ground or rigid platform interfacing of the unit with respect to stack 16. In the placement method shown in FIGS. 1 and 2, hydraulic jacks 18 serve as a semipermanent operating platform for unit 10 when such is in service. Chassis 14 is then removed from system 10 and connection paths are aligned between housing 10 and exhaust stack 16 as shown in FIG. 2.

In broad detail, pollution reduction system 10 is seen to be incorporated into truck chassis 14 of the drop-off type as has been described. Housing 10 is then left in a predetermined external location with respect to building 12 in specified relation to exhaust stack 16 on semipermanent stands 18. Unit 10 is connected through duct work or conduits to stack or chimney l6 and waste gases passing therethrough to the atmosphere in an untreated manner are diverted into unit 10. After treatment of the waste gases within housing 10, the gases are returned to stack 16 or other conduit for expulsion to the atmosphere.

System or enclosed housing incorporates within its framework pollution reducing apparatus to be described in detail in following paragraphs. Housing 10 has longitudinally displaced front and rear walls 20 and opposing sidewalls 22 transversely displaced as shown. Construction of unit 10 includes a basic water proof framework of material inert to chemical reactions with the waste gas passing through. In addition, due to the possibly corrosive as well as hot gases being treated, outer walls 20, 22 as well as upper and lower walls 26 include a heat resistant covering layer and sound proofing material such as asbestos, high density fiberglass or other such combination. As required, unit 10 may be maintained through service doors 24 shown in place on housing frontal wall 20 in FIGS. 1 and 2. Doors 24 allow replacement of specified apparatus within unit 10 from time to time during an operation cycle without seriously disrupting the cleaning procedure. Upper surface wall 26 includes a pair of openings 28 to be connected with appropriate ductwork to exhaust stack 16 to accomplish intake and exhaust procedures for the waste gas being cleansed.

FIG. 3 details the inlet and outlet conduit system attached on opposing ends to stack 16 and housing 10 respectively. Waste gases passing in a substantially vertical direction shown by arrow 30 pass through stack 16 to the atmosphere. Inlet and outlet conduits 34, 32 comprising the basic duct connection between stack 16 and-housing 10 are attached thereto on opposing ends as shown in FIGS. 1 and 2. Taps into stack 16 are made essentially as shown in FIG. 3 with exhaust conduit 32 vertically displaced and above inlet conduit 34 in a manner such that normally directed waste gas flow first passes the inlet tap section before passing the outlet tap. In other words, within stack 16, whether vertically directed or not, outlet conduit 32 must be positioned downstream with respect to inlet conduit 34.

Inlet conduit 34 includes waste gas mechanism 36 which may be a cap totatably attached to the perifery of inlet conduit 34. Upon insertion of conduit 34 into stack 16, cap 36 may be adjusted across the cross-sectional opening to interrupt the flow of waste gases. As shown in FIG. 3, cap 36 may include hinge 40 wherein mechanism 36 may be rotated to a proper interrupt position. In the case of a malfunction in unit 10, butterfly valves 38 may be actuated to close cap 36 on inlet conduit 34 thus allowing gas flow 30 to by-pass unit 10 and operate normally without recourse to system 10. Interrupt mechanism 36 may take on a variety of standard closures such as cap 36 as has been described, or an extension connected to a wall of conduit 34. This type of rigid extension may be positioned permanently as insert of conduit 34 is made into stack 16. Both inlet and exhaust conduits 34, 32 passing between stack 16 and unit 10 are connected thereto through conventional pipe tapping means not important to the basic inventive concept. Further inlet and outlet conduits 34, 32 may have incorporated dry filters to initially and finally filter the waste gases. In the manner described, waste gas flow 30 is interrupted from its normal path by mechanism 36 and directed into conduit 34 in preparation for processing within unit 10. The cleansed waste gas is exhausted through conduit 32 positioned in stack 16 downstream of conduit 34 and passed to the atmosphere.

Inlet of waste gas flow 30 into unit 10 is shown in detail in FIG. 4. As seen, waste gas initially passes through inlet conduit 34- and enters motor driven fan 42 which creates a high pressure velocity flow of the incoming gas. In addition, fan 42 provides a differential pressure between downstream intake conduits 46 and stack 16 to promote a continuous flow of waste gases into unit 10. Generally, fan 42 may be of the centrifugal or reciprocating type but must be constructed of 7 materials which can withstand the high temperature waste gases in the order of 500 F. or above. Material construction of fan unit 42 may be of stainless steel or like materials to acceptably operate in the aforementioned high temperature corrosive environment.

Waste gases passing from the outlet of fan 42 may include unburned or incompletely burned components such as carbon monoxide, sulpher, or other solid particles such as carbon which could be advantageously burned. In order to promote as much conbusting of fuel as possible, combustion chamber 44 may be included within inlet conduit 34. As shown, chamber 44 intakes incompletely burned waste gas from fan unit- 42 and combusts any unburned excess fucld present in the flow. Combustion chamber 44 essentially acting as an afterburner, may be of the forced or induced air variety and is well known in the art. In the normal sequence of operations, chamber 44, if used, is the first processing stage within unit 10. In general, it is a relatively small plenum which is brought to'a high temperature therein igniting any remaining flammable materials to complete their combustion. For industrial gases in which there is no significant portion of unburned materials, chamber 44 may be omitted from unit 10.

Gases exiting from chamber 44 are forced into unit 10 through a plurality of downstream conduits 46 which are placed transversely to longitudinally opposing frontal walls 20 insure a uniform density waste gas flow input throughout the cross-sectional area of housing 10.

Upon waste gas exit from upstream intake conduits 46 the gas enters a water or fluid scrubbing system. The concept of water scrubbing is well known in the art, however, the particular structure as detailed in the following paragraphs difiers in the basic concept from those previously known. Broadly stated, thereis provided a flow path 54 for the gases as they pass through housing 10 making 180 reversals in direction as the gas passes from inlet to exhaust. The gases are further subjected to high pressure fluid sprays of predetermined fluid particle size, dependent upon the location of the waste gas within unit 10. In general, the initial banks of sprays are mist like or fine sprays being highly atomized, as the gas continues its passage through unit 10 the spray particles are gradually increased in size. The purpose of water scrubbing is to capture various solid particle pollutants in fine fluid droplets thus filtering them out of the waste gas.

A plurality of planar vertically displaced tables 48 are fixedly secured within housing 10 to opposing walls 20, 22. Tables 48 extend in a partial longitudinal direction to define a continuous vertically oriented gas flow path 54 within unit 10. Planar tables 48 are longitudinally declined in opposing directions between consecutive vertically displaced tables to provide a gravity assist to an impinging fluid stream. In this manner, fluid flow through housing successively passes along and between the plurality of vertically stacked tables 48.

As is seen in FIG. 4 uppermost table 48 is rigidly secured to opposing sidewalls 22 and frontal wall 20, but does not pass the entire longitudinal length of housing 10. This allows the fluid stream flowing longitudinally on table 48 to pass unobstructed to the next consecutively placed tablebelow. The second table is similarly secured to housing walls 22 but now passes partially in the longitudinal direction between back walls 20 and the forward frontal wall. In this way, the combination of having tables 48 opposingly declined and partially extended provides a compact passageway for the waste gas and fluid stream from one table 48 to the next. Fluid conduits 50 are positioned in a transverse direction to the waste gas flow path 54. Conduits 50 are rigidly secured, in the first bank of mechanisms to upper wall 26 of housing 10 or to a frame construction adjacent to the walls of the unit. Spray heads 52 spaced in a transversely displaced manner along each of fluid conduits 50 to provide a continuous stream of fluid particles passing through the gas flow. In general, the spray captures various solid particles in fine water or oil droplets which impinges on a corresponding table 48. Further rows of conduits 50 are secured to a corresponding table 48 located above the table upon which that particular row is impinging as shown in FIG. 4. Water or oil passing normal to flow path 54 impinges on a declined table 48 to form a stream which passes from the edge to form a waterfall or curtain. As the gas flow reverses its direction between consecutively spaced tables 48, it must pass through the fluid curtain which allows additional exposure to the fluid stream to capture additional particles. As the gas flow continues in a vertical descending direction through the banks of tables 48 in'housing 10, spray heads 52 yield a coarser fluid droplet size for the purpose of flushing now wet particles out of the remaining waste gas and into the fluid stream.

Removeable tray or sump 56 extends both longitudinally and transversely along the entire cross-sectional area of the bottom surface of housing 10. Tray 56 is provided to intake the fluid stream continually flowing through the banks of tables 48. As shown in FIG. 5 a plurality of screens 58 are provided and positioned transverse to the longitudinal flow and in a vertically secured manner to the bottom surface of sump 56. Fluid flow into sump 56 forces fluid through screens 58 having increasingly fine meshes to successively screen out particles of predetermined sizes. In addition, baffles 60 are vertically attached to the lowermost planar table 62 extending in a transverse direction between housing sidewalls 22 but not passing the entire transverse length therebetween. By providing baffles 60 above fluid line 64 within sump 56, the waste gas is forced around and through baffles 60 for the purpose of capturing any remaining moisture from the gases before intake into outlet conduit 32. Fluid, within tray 56 is passed into exhaust filter 66 to recirculate the fluid through conduits 50 and spray heads 52 to form a continuous cycle. In this manner, fluid in sump 56 passes into exhaust 66, through exhaust pipe 68 and returns to conduits 50 with the aid of a standard pump not shown. Waste gases above fluid level 64 flow through baffles 60 and into exhaust conduit 32 wherein a final filter may be placed to provide increased pollutant containment means. Cleansed waste gases then passing through conduit 32 are driven into exhaust stack 16 and expelled to the atmosphere.

In an addition to unit 10, a fluid cooling system may be incorporated within or adjacent to housing 10. Fluid passing through the system has a tendency to be heated by contact with the relatively hot waste gases. The fluid may be tapped before final filtration 66 and run through a cooling tower where it is exposed to the external environment and then returned either to sump 56 or passed into final filter 66 for recirculation.

Method of Operation The cycle of operation begins with waste gas being ejected through stack 16. Waste gases are injected from exhaust stack 16 into enclosed housing 10 by interrupting the path of the waste gases and deflecting waste gas flow into inlet conduit 34 by means of interrupt mechanism 36. Waste gas flow through conduit 34 is blown into enclosed housing 10 under a high pressure produced by fan unit 42. Waste gases are ignited in chamber 44 after injection into housing 10 but prior to forming waste gas flow path 54. Flow path 54 is then formed between vertically displaced planar tables 48 which are secured within housing 10. A fluid stream of water, oil or other compound soluble to the pollutants within the waste gas is injected normal to the flow direction of the gas flow path 54.

Upon completion of the flow of waste gas through unit 10 the fluid stream and cleansed waste gases are collected within sump 56 wherein the fluid stream is filtered through a plurality of screens 58. The final flow of gas above fluid level 64 in sump 56 is filtered utilizing a series of baffles 60 which forces the gas through and around the filtering baffles 60. Waste gases are then transported through exhaust conduitv 32, after passing a final dry filter 70, into exhaust stack 16 for expulsion to the atmosphere.

The fluid stream within sump 56 is prepared for recirculation through conduits 50 and spray heads 52. Fluid may be removed from sump 56 prior to recirculation for cooling purposes. Where this step is found necessary, the fluid may be transferred to a cooling tower where it is exposed to the atmosphere. Once cooled the fluid may be brought back to sump 56 or directly prepared for recirculation. Upon completion of this cycle all elements are positioned totheir initial conditions and another cycle may be initiated in a continuous mode of operation.

As a matter of engineering design, it may be preferable not to provide the fan at location 42, since it is there exposed to hot gasses which may tend to accelerate its corrosion. To avoid this, without sacrifice of any function of the invention, the fan may be provided adjacent the final filter 70, preferably just before it. Thus, in that embodiment, 42 is a plenum which is available for some treatment step desirable for a particular type of condition, and the housing identified 70 accommodates both the final filter and the fan.

The scope of this invention is to determined by the appended claims and not limited to the foregoing description and drawings which are illustrative.

What is claimed is:

1. A mobile air cleaning system enclosed within a truck body to remove pollutants from waste gases passing through an exhaust stack located external to said system, comprising:

a. a pair of inlet and exhaust conduits having opposed ends inserted into said truck body and said exhaust stack respectively, forming a through passage therebetween;

. interrupt means fastened to said inlet conduit and insertable within said exhaust stack, said interrupt means for interrupting waste gas flow through said exhaust stack and deflecting said flow into said truck body;

c. a plurality of vertically displaced planar tables being fixedly secured within said truck body, said tables extending partially longitudinal defining a continuous flow path for said waste gases within said body;

d. waste gas cleaning means rigidly fastened to said truck body for injecting a fluid through said flow path of said waste gases, said fluid to impinge on said waste gas flow in a fluid stream path; and,

e. collection and transport means to transfer said cleansed waste gas into said exhaust stack through said exhaust conduit and recirculate said fluid stream through said waste gas cleaning means.

i 2. An air cleaning system adapted to remove pollutants from waste gases being transported through an exhaust'stack located external to said system, comprising:

a. an enclosed housing adjacent to said exhaust stack, said housing having longitudinally displaced opposing frontal and rear walls and sidewalls transversely displaced;

b. a pair of inlet and exhaust conduits having opposed ends inserted into said enclosed housing and exhaust stack respectively, forming a through passage therebetween; v i

c. means for interruptingsaid waste gas flow through said exhaust stack and deflecting said flow into said enclosed housing; I

d. a plurality of vertically displaced planar tables being fixedly secured within said housing to said opposing walls, said tables extending partially longitudinal defining a continuous flow path for said waste gases within said housing;

e. waste gas cleaningmeans rigidly fastened to said housing for injecting a fluid through said flow path of said waste gases, said fluid to impinge on said planar tables and capture solid particles from said waste gas flow in a fluid stream path; and,

f. collection and transport means to transfer said cleansed waste gas into said exhaust stack through said exhaust conduit and recirculate said fluid stream through said waste gas cleaning means.

3. The system as recited in claim 2 wherein said outlet exhaust conduit interfaces with said exhaust stack vertically displaced from and positioned above said inlet'conduit interface with said exhaust stack.

4. The system as recited in claim 3 wherein said inlet conduit extends through a lateral wall of said exhaust stack, said inlet conduit having an axial extension member substantially equal to the cross-sectional area of said stack, said extension member positioned normal to said waste gas flow within said stack to deflect said waste gas into said inlet conduit.

opposing 5. The system as recited in claim 3 wherein said inlet conduit includes a deflection cap substantially equal in diameter to said inlet conduit and positioned on said end of said conduit interfacing with said exhaust stack, said deflection cap hinged at a peripheral point of said inlet conduit and rotatable to an axial extension with respect to said inlet conduit.

6. The system as recited in claim 2 wherein said plurality of planar tables are longitudinally declined in an opposing direction between consecutive vertically displaced tables for providing gravity assist to said fluid stream movement.

7. The system as recited in claim 2 wherein said waste gas cleaning means comprises:

a. a plurality of fluid conduits secured to said sidewalls of said housing being longitudinally displaced from each other for passage of fluid transverse to said flow path of said waste gases; and,

b. a plurality of spray heads transversely displaced on each of said fluid conduits, said spray heads having openings of predetermined size for injecting said fluid normal to said flow path of said waste gas.

8. The system as recited in claim 7 wherein said plurality of fluid conduits and spray heads are positioned adjacent to said planar tables, said conduits secured to a lower surface of said tables for impingement of said fluid on an upper surface of a next consecutive vertically displaced planar table.

9. The system as recited in claim 2 wherein said collection and transport means comprises:

a. a sump positioned below said plurality of planar tables extending longitudinally and transversely across a bottom wall of said housing, said sump including a fluid stream outlet opening at one end thereof; and,

b. a fluid pump located adjacent to said outlet open- 'ing for recirculating said-fluid waste gas cleaning means. j

10. The system as recited in claim sump includes a plurality of screens extending in said transverse and vertical directions. within said sump,

each of said screens having a predetermined screen mesh to capture fluid stream particlea of different sizes.

stream into said 1 l. The system as recited in claim 9 wherein said col-' lection and transport means includes a plurality of baffles extending vertically into said gas flow path between said sump and said lower surface of an adjacent planar table. 1

12. The system as recited in claim 9 wherein said collection and transport means includes fluid cooling means adjacent ti said sump for cooling said fluid stream, said ,water cooling means having an entrance passage from said sump and an exit passage to said fluid p P- 1 v 13. The system as recited in claim 11 wherein said water cooling means includes a fluid tower exposed to the atmosphere for cooling of said fluid stream by connection heat transport.

l4. The system as recited in claim 2 including a combustion chamber attached on a first end to said inlet conduit for combusting unburned fueld particles passing through said exhaust stack, and on a second end forming a through passage to said housing to provide said flow of waste gases through said waste gas cleaning menas.

9 wherein said 15. The system as recited in claim 2 including a fan positioned within said inlet conduit for providing a high pressure stream said waste gas flow through said enclosed housing paths.

16. The system as recited in claim 2 wherein said injected fluid is water.

17. The system as recited in claim 2 wherein said injected fluid is oil.

18. A method for removing pollutants from waste gases being transported through an exhaust stack comprising the steps of:

a. injecting waste gases from said exhaust stack into an enclosed housing;

b. forming a waste gas flow path between vertically displaced planar tables secured within said houss;

c. injecting a fluid stream normal to the flow direction of said waste gas;

d. collecting said fluid stream and cleansed waste gases within a sump after passage through said paths defined by said planar tables; and,

e. transporting said waste gases to said exhaust stack and said fluid stream for reinjection normal to said flow direction of said waste gas.

19. The method as recited in claim 18 wherein the step of injecting waste gases into said enclosed housing includes the steps of:

a. interrupting said transportation of said waste gases through said exhaust stack;

b. deflecting said waste gas flow through an inlet conduit passing into said enclosed housing.

20. The method as recited in claim 19 wherein the step of deflecting said waste gas flow includes the step of blowing said waste gas into said enclosed housing under high pressure through a fan positioned within said inlet conduit.

21. The method as recited in claim 18 including the step of combusting said waste gases after injection into said housing and prior to forming said waste gas flow path.

22. The method as recited in claim 18 wherein the step of injecting a fluid stream includes the step of spraying said fluid stream through a plurality of spray heads having predetermined fluid passage openings.

23. The method as recited in claim 18 wherein the step of collecting said fluid stream and cleansed waste gases includes the steps of:

a. filtering said fluid stream within said sump; and,

b. baffling said flow path defined between said sump and said opposing planar table to force said waste gases through a circuitorious path.

24. The method of recited in claim 23 wherein the step of filtering said fluid stream includes the step of placing a plurality of screens within said sump normal to said flow path of said fluid stream.

25. The method as recited in claim 18 including the .steps of:

a. transferring said fluid stream into a cooling tower after collection in said sump; and,

b. cooling said fluid stream in said cooling tower by exposure to the atmosphere prior to reinjection of said fluid stream into said waste gas flow path.

26. The method as recited in claim 18 wherein the step of transporting said waste gases includes passing said waste gases through an exhaust passage inserted into said exhaust stack.

27. The method as recited in claim 18 wherein the UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent N 3, 719 ,028 Dated March 6; 1973 Inventor(s) RALPH J BROOKS It is certified that error appears in the above -identified patent and that said Letters Patent are hereby corrected as shown below:

Cancel the illustrative figure of drawing on the cover sheet and replace with Figures 1 and 4 of the'attached figures.

Cancel the three sheets of drawing and substitute the two attached sheets of drawing.

Signed and sealed this 18th day of December 1973.

s EAL) Attestz EDWARD M.FLETCHER,JR. RENE. D. TEGTMEYER- Attesting Officer Acting Commissioner of Pateni FORM PO-IOSO (10-691 USCOMWDC 37$! 37 U.5. GOVERNMENT PRINTING OFFICE I959 0-3663 PATENT NUMBER 3 719., 028 PAGE 2 RALPH J. aRo'oKs ATTORNEY PATENT NUMBER PAGE . I INVENTOR f J RALPH J. BROOKS BY 9 v I A TORNEY I v 

1. A mobile air cleaning system enclosed within a truck body to remove pollutants from waste gases passing through an exhaust stack located external to said system, comprising: a. a pair of inlet and exhaust conduits having opposed ends inserted into said truck body and said exhaust stack respectively, forming a through passage therebetween; b. interrupt means fastened to said inlet conduit and insertable within said exhaust stack, said interrupt means for interrupting waste gas flow through said exhaust stack and deflecting said flow into said truck body; c. a plurality of vertically displaced planar tables being fixedly secured within said truck body, said tables extending partially longitudinal defining a continuous flow path for said waste gases within said body; d. waste gas cleaning means rigidly fastened to said truck body for injecting a fluid through said flow path of said waste gases, said fluid to impinge on said waste gas flow in a fluid stream path; and, e. collection and transport means to transfer said cleansed waste gas into said exhaust stack through said exhaust conduit and recirculate said fluid stream through said waste gas cleaning means.
 2. An air cleaning system adapted to remove pollutants from waste gases being transported through an exhaust stack located external to said system, comprising: a. an enclosed housing adjacent to said exhaust stack, said housing having longitudinally displaced opposing frontal and rear walls and opposing sidewalls transversely displaced; b. a pair of inlet and exhaust conduits having opposed ends inserted into said enclosed housing and exhaust stack respectively, forming a through passage therebetween; c. means for interrupting said waste gas flow through said exhaust stack and deflecting said flow into said enclosed housing; d. a plurality of vertically displaced planar tables being fixedly secured within said housing to said opposing walls, said tables extending partially longitudinal defining a continuous flow path for said waste gases within said housing; e. waste gas cleaning means rigidly fastened to said housing for injecting a fluid through said flow path of said waste gases, said fluid to impinge on said planar tables and capture solid particles from said waste gas flow in a fluid stream path; and, f. collection and transport means to transfer said cleansed waste gas into said exhaust stack through said exhaust conduit and recirculate said fluid stream through said waste gas cleaning means.
 3. The system as recIted in claim 2 wherein said outlet exhaust conduit interfaces with said exhaust stack vertically displaced from and positioned above said inlet conduit interface with said exhaust stack.
 4. The system as recited in claim 3 wherein said inlet conduit extends through a lateral wall of said exhaust stack, said inlet conduit having an axial extension member substantially equal to the cross-sectional area of said stack, said extension member positioned normal to said waste gas flow within said stack to deflect said waste gas into said inlet conduit.
 5. The system as recited in claim 3 wherein said inlet conduit includes a deflection cap substantially equal in diameter to said inlet conduit and positioned on said end of said conduit interfacing with said exhaust stack, said deflection cap hinged at a peripheral point of said inlet conduit and rotatable to an axial extension with respect to said inlet conduit.
 6. The system as recited in claim 2 wherein said plurality of planar tables are longitudinally declined in an opposing direction between consecutive vertically displaced tables for providing gravity assist to said fluid stream movement.
 7. The system as recited in claim 2 wherein said waste gas cleaning means comprises: a. a plurality of fluid conduits secured to said sidewalls of said housing being longitudinally displaced from each other for passage of fluid transverse to said flow path of said waste gases; and, b. a plurality of spray heads transversely displaced on each of said fluid conduits, said spray heads having openings of predetermined size for injecting said fluid normal to said flow path of said waste gas.
 8. The system as recited in claim 7 wherein said plurality of fluid conduits and spray heads are positioned adjacent to said planar tables, said conduits secured to a lower surface of said tables for impingement of said fluid on an upper surface of a next consecutive vertically displaced planar table.
 9. The system as recited in claim 2 wherein said collection and transport means comprises: a. a sump positioned below said plurality of planar tables extending longitudinally and transversely across a bottom wall of said housing, said sump including a fluid stream outlet opening at one end thereof; and, b. a fluid pump located adjacent to said outlet opening for recirculating said fluid stream into said waste gas cleaning means.
 10. The system as recited in claim 9 wherein said sump includes a plurality of screens extending in said transverse and vertical directions within said sump, each of said screens having a predetermined screen mesh to capture fluid stream particlea of different sizes.
 11. The system as recited in claim 9 wherein said collection and transport means includes a plurality of baffles extending vertically into said gas flow path between said sump and said lower surface of an adjacent planar table.
 12. The system as recited in claim 9 wherein said collection and transport means includes fluid cooling means adjacent ti said sump for cooling said fluid stream, said water cooling means having an entrance passage from said sump and an exit passage to said fluid pump.
 13. The system as recited in claim 11 wherein said water cooling means includes a fluid tower exposed to the atmosphere for cooling of said fluid stream by connection heat transport.
 14. The system as recited in claim 2 including a combustion chamber attached on a first end to said inlet conduit for combusting unburned fueld particles passing through said exhaust stack, and on a second end forming a through passage to said housing to provide said flow of waste gases through said waste gas cleaning menas.
 15. The system as recited in claim 2 including a fan positioned within said inlet conduit for providing a high pressure stream said waste gas flow through said enclosed housing paths.
 16. The system as recited in claim 2 wherein said injected fluid is water.
 17. The system as recited in claim 2 wherein said injected fluid is oIl.
 18. A method for removing pollutants from waste gases being transported through an exhaust stack comprising the steps of: a. injecting waste gases from said exhaust stack into an enclosed housing; b. forming a waste gas flow path between vertically displaced planar tables secured within said housing; c. injecting a fluid stream normal to the flow direction of said waste gas; d. collecting said fluid stream and cleansed waste gases within a sump after passage through said paths defined by said planar tables; and, e. transporting said waste gases to said exhaust stack and said fluid stream for reinjection normal to said flow direction of said waste gas.
 19. The method as recited in claim 18 wherein the step of injecting waste gases into said enclosed housing includes the steps of: a. interrupting said transportation of said waste gases through said exhaust stack; b. deflecting said waste gas flow through an inlet conduit passing into said enclosed housing.
 20. The method as recited in claim 19 wherein the step of deflecting said waste gas flow includes the step of blowing said waste gas into said enclosed housing under high pressure through a fan positioned within said inlet conduit.
 21. The method as recited in claim 18 including the step of combusting said waste gases after injection into said housing and prior to forming said waste gas flow path.
 22. The method as recited in claim 18 wherein the step of injecting a fluid stream includes the step of spraying said fluid stream through a plurality of spray heads having predetermined fluid passage openings.
 23. The method as recited in claim 18 wherein the step of collecting said fluid stream and cleansed waste gases includes the steps of: a. filtering said fluid stream within said sump; and, b. baffling said flow path defined between said sump and said opposing planar table to force said waste gases through a circuitorious path.
 24. The method of recited in claim 23 wherein the step of filtering said fluid stream includes the step of placing a plurality of screens within said sump normal to said flow path of said fluid stream.
 25. The method as recited in claim 18 including the steps of: a. transferring said fluid stream into a cooling tower after collection in said sump; and, b. cooling said fluid stream in said cooling tower by exposure to the atmosphere prior to reinjection of said fluid stream into said waste gas flow path.
 26. The method as recited in claim 18 wherein the step of transporting said waste gases includes passing said waste gases through an exhaust passage inserted into said exhaust stack.
 27. The method as recited in claim 18 wherein the step of transporting said fluid stream includes the step of recirculating said fluid stream for injection through said waste gas flow path between said vertically displaced planar tables. 